* {
    margin: 0;
    padding: 0;
    list-style:none;
    box-sizing: border-box;
    text-decoration: none;
}
body {
    width: 100vw;
    height: 100vh;
    font-family: Arial, Helvetica, sans-serif;
    background: url(images/city_03.jpg) no-repeat 0 80px;
    background-size: 100%;
}
nav {
    height: 80px;
    width: 100%;
    line-height: 80px;
    background-color: #0082e6;
}
label.logo {
    color: #fff;
    font-size: 35px;
    padding: 0 100px;
    font-weight: 700;
}
ul {
    margin-right: 50px;
    float: right;
}
ul li {
    margin: 0 5px;
    display: inline-block;
}
ul li a {
    padding: 10px;
    color: #fff;
    font-size: 18px;
    border-radius: 3px;
    text-transform: uppercase;
}
a.ative, a:hover {
    background-color: #1b9bff;
    transition: .5s;
}
.checkbtn {
    display: none;
    margin-right: 40px;
    float: right;
    font-size: 30px;
    line-height: 80px;
    color: #fff;
    cursor: pointer;
}
#check {
    display: none;
}
@media (max-width:768px) {
    .checkbtn {
        display: block;
    }
    ul {
        position: fixed;
        width: 100%;
        height: 100vh;
        top: 80px;
        left: -100%;
        text-align: center;
        transition: all .3s;
        background-color: #2c3e5070;
        filter: blur(.3);
    }
    ul li {
        display: block;
    }
    ul li a {
        font-size: 20px;
    }
    a:hover,a.ative {
        background: none;
        color: #0082e6;
    }
    #check:checked~ul {
        left: 0;
    }
}
@media (max-width:998px) {
    label.logo {
        font-size: 30px;
        padding-left: 50px;
    }
    ul li a {
        font-size: 16px;
    }
}